acldvppJpegGetImageInfo

Applicable Products

Product	Supported
Ascend 950PR/Ascend 950DT	x
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	√
Atlas inference products	√
Atlas training products	√

Function

Reads the width, height, and color channel count from the buffer that stores the JPEG image data.

This API checks whether the image format supports decoding. For an unsupported stream, the API returns the error code ACL_ERROR_UNSUPPORTED_JPEG. For details, see aclError.

Prototype

aclError acldvppJpegGetImageInfo(const void *data,
uint32_t size,
uint32_t *width,
uint32_t *height,
int32_t *components)

Parameters

Parameter	Input/Output	Description
data	Input	Pointer to the address of the buffer that stores the JPEG image.
size	Input	Buffer size in bytes.
width	Output	Pointer to the image width.
height	Output	Pointer to the image height.
components	Output	Pointer to the number of color channels.

Returns

0: The information is obtained successfully. Other values: The information fails to be obtained. For details, see aclError.

Parent topic: JPEGD